WATCO WATER
Arizona — Community Water System — PWSID: AZ0409049
System Information
| PWSID | AZ0409049 |
| System Name | WATCO WATER |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 09 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Jun 13, 1997 |
| Last Reported | Nov 17, 2025 |
Location & Contact
| State | Arizona |
| City | TUCSON |
| ZIP Code | 85754 |
| Address | PO BOX 85160 |
| Organization | SOUTHWESTERN UTILITY MGMT INC |
| Phone | 520-623-5172 |
Population & Service
| Population Served | 1,153 |
| Service Connections | 332 |
Drinking Water Violations (73)
This water system has 73 violations recorded in the EPA SDWIS database.
| Begin Date | End Date | Contaminant | Category | Health-Based | Major | Measured | Federal MCL | State MCL | Status | Return to Compliance | Rule |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Sep 1, 2025 | Sep 30, 2025 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Archived | Sep 30, 2025 | Revised Total Coliform Rule |
| Jul 1, 2025 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Unaddressed | — | Consumer Confidence Rule |
| Jan 1, 2025 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Unaddressed | — | Lead and Copper Rule |
| Oct 2, 2024 | — | Public Notice | Other | No | No | — | — | — | Unaddressed | — | Public Notice Rule and Revised PN Rule |
| Oct 1, 2023 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Jan 22, 2025 | Lead and Copper Rule |
| Oct 1, 2023 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Jan 22, 2025 | Lead and Copper Rule |
| Oct 1, 2023 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Jan 22, 2025 | Lead and Copper Rule |
| Jun 1, 2023 | Jun 30, 2023 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Jun 30, 2023 | Revised Total Coliform Rule |
| Jun 1, 2023 | Jun 30, 2023 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Jun 30, 2023 | Revised Total Coliform Rule |
| Jun 1, 2023 | Jun 30, 2023 | Revised Total Coliform Rule | MON | No | Yes | — | — | — | Resolved | Jun 30, 2023 | Revised Total Coliform Rule |
| Nov 6, 2022 | — | Revised Total Coliform Rule | TT | Yes | No | — | — | — | Resolved | Jan 17, 2023 | Revised Total Coliform Rule |
| Nov 6, 2022 | — | Revised Total Coliform Rule | TT | Yes | No | — | — | — | Resolved | Jan 17, 2023 | Revised Total Coliform Rule |
| Sep 1, 2022 | — | Revised Total Coliform Rule | RPT | No | No | — | — | — | Resolved | Nov 14, 2022 | Revised Total Coliform Rule |
| Sep 1, 2022 | — | Revised Total Coliform Rule | RPT | No | No | — | — | — | Resolved | Nov 14, 2022 | Revised Total Coliform Rule |
| Oct 23, 2020 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Nov 10, 2021 | Lead and Copper Rule |
| Oct 23, 2020 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Nov 10, 2021 | Lead and Copper Rule |
| Oct 1, 2020 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Oct 16, 2020 | Lead and Copper Rule |
| Oct 1, 2020 | — | Lead and Copper Rule | MR | No | No | — | TT | — | Resolved | Oct 16, 2020 | Lead and Copper Rule |
| Jul 1, 2020 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Sep 30, 2020 | Consumer Confidence Rule |
| Jul 1, 2020 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Sep 30, 2020 | Consumer Confidence Rule |
| Oct 1, 2015 | Oct 31, 2015 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Oct 31, 2015 | Total Coliform Rule |
| Oct 1, 2015 | Oct 31, 2015 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Oct 31, 2015 | Total Coliform Rule |
| Sep 25, 2015 | — | E. COLI | MR | No | Yes | — | — | — | Resolved | Mar 1, 2016 | Ground Water Rule |
| Sep 25, 2015 | — | E. COLI | MR | No | Yes | — | — | — | Resolved | Mar 1, 2016 | Ground Water Rule |
| Sep 25, 2015 | — | E. COLI | MR | No | Yes | — | — | — | Resolved | Mar 1, 2016 | Ground Water Rule |
| Jul 1, 2015 | Jul 31, 2015 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jul 31, 2015 | Total Coliform Rule |
| Jul 1, 2015 | Jul 31, 2015 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jul 31, 2015 | Total Coliform Rule |
| Nov 1, 2014 | Nov 30, 2014 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Nov 30, 2014 | Total Coliform Rule |
| Nov 1, 2014 | Nov 30, 2014 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Nov 30, 2014 | Total Coliform Rule |
| Jul 1, 2014 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 9, 2014 | Consumer Confidence Rule |
| May 1, 2014 | May 31, 2014 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | May 31, 2014 | Total Coliform Rule |
| May 1, 2014 | May 31, 2014 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | May 31, 2014 | Total Coliform Rule |
| Apr 1, 2014 | Apr 30, 2014 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Apr 30, 2014 | Total Coliform Rule |
| Apr 1, 2014 | Apr 30, 2014 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Apr 30, 2014 | Total Coliform Rule |
| Mar 1, 2014 | Mar 31, 2014 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Mar 31, 2014 | Total Coliform Rule |
| Mar 1, 2014 | Mar 31, 2014 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Mar 31, 2014 | Total Coliform Rule |
| Oct 1, 2012 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 1, 2013 | Consumer Confidence Rule |
| Dec 1, 2011 | Dec 31, 2011 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Dec 31, 2011 | Total Coliform Rule |
| Dec 1, 2011 | Dec 31, 2011 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Dec 31, 2011 | Total Coliform Rule |
| Oct 1, 2011 | Oct 31, 2011 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Oct 31, 2011 | Total Coliform Rule |
| Oct 1, 2011 | Oct 31, 2011 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Oct 31, 2011 | Total Coliform Rule |
| Oct 1, 2011 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 1, 2013 | Consumer Confidence Rule |
| Aug 1, 2011 | Aug 31, 2011 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Aug 31, 2011 | Total Coliform Rule |
| Aug 1, 2011 | Aug 31, 2011 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Aug 31, 2011 | Total Coliform Rule |
| Jul 1, 2011 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 8, 2011 | Consumer Confidence Rule |
| Oct 1, 2010 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 1, 2013 | Consumer Confidence Rule |
| Feb 1, 2010 | Feb 28, 2010 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Feb 28, 2010 | Total Coliform Rule |
| Feb 1, 2010 | Feb 28, 2010 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Feb 28, 2010 | Total Coliform Rule |
| Aug 1, 2009 | Aug 31, 2009 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Aug 31, 2009 | Total Coliform Rule |
| Aug 1, 2009 | Aug 31, 2009 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Aug 31, 2009 | Total Coliform Rule |
About This Water System
Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.